Often, a firewall allows programs to communicate unrestricted over the internet; if that program was targeted by a virus or missed by your antivirus, it may now be reporting your personal information to a malicious websites or simply waiting for remote commands.
Simply enter your port number above to find detailed information. Want to browse our port database rather than use our easy search tool? Here is a listing of computer ports below with each linking to individual pages about what programs may have that port open.
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